SKF SPEEDI-SLEEVE new generation

1 SKF SPEEDI-SLEEVE new generationand wear sleeves for heavy industrial applicationsThe new generation concept and characteristics ..3 Installing SKF SPEEDI-SLEEVE ..6 Product tables ..8 Metric dimensions ..8 Inch dimensions ..20 Wear sleeves for heavy industrial tables ..34 Metric dimensions ..34 Inch dimensions ..36 SKF the knowledge engineering company ..42 Contents2 The new generation concept and characteristicsEnhanced sealing system solution To seal effectively, radial shaft seals must run against a smooth, round counterface. If the counterface becomes worn, the seal will no longer be able to fulfil its function, which is to retain lubricant and to exclude , the counterface becomes scored when a contaminant particle is caught under the sealing lip and abrades a track as the shaft rotates.

2 As this continues, the seal will enable more particles to pass or get stuck eventually leading to malfunction of the component that the sealing system is meant to protect. A sim-ple seal replacement will not be sufficient and to repair the shaft, it is usually necessary to disassemble the machine to be able to grind down the counterface until it is within specifi-cation again. Otherwise, the sealing system will not function SPEEDI-SLEEVE is a well-proven solu-tion to overcome problems with worn shafts, without having to disassemble the shaft or specifying a new size of the replacement seal, while offering an excellent sealing surface. Now, SKF has developed a patent pending new generation SKF SPEEDI-SLEEVE with features providing an even further enhanced sealing system new generation of SKF SPEEDI-SLEEVE combines a proprietary stainless steel mate-rial and manufacturing process, resulting in an optimized seal counterface surface that minimizes wear on both the sleeve and sealing lip.

3 The proprietary material provides increased strength and excellent ductility properties of the sleeve . Imperceptible lubricant pockets enable the lubricant to reside on the sleeve and thereby prevent dry running of the sealing lip that otherwise can create excessive wear. The sleeves are thin-walled (0,28 mm ( in.)) and the contact surface is wear resistant and manufactured to minimize directionality (0 0,05) with a finish of Ra 0,25 to 0,5 m (10 to 20 in.). This is, in fact, a better counter-face than can often be achieved on a optimized sealing system: SKF SPEEDI-SLEEVE new generation + SKF radial shaft seal 3 Removable flangeSKF SPEEDI-SLEEVE has a removable flange to simplify installation ( fig. 1). The flange can most often be left intact, but in applica-tions where the flange will interfere with other system components, it should be removed so it does not cause friction heat and wear debris.

4 The flange should also be removed in applica-tions where it may reduce the supply of lubri-cant to the seal. This would cause a reduced cooling effect of the lubricant, resulting in ele-vated underlip temperature and premature ageing of the seal material. If the flange is to be removed, it should be cut from the outside diameter into the radius in one location prior to installation. The flange can then be twisted and raised up after instal-lation and grasped with a pair of pliers and twisted into a coil. SKF SPEEDI-SLEEVE GoldThe new generation of SKF SPEEDI-SLEEVE is also available in the Gold version, designed for highly abrasive applications. A thin, metal-lic coating applied to the base stainless steel imparts a gold colour and significantly increas-es durability.

5 SKF SPEEDI-SLEEVE Gold is particularly effective in environments where there are abrasive contaminants, especially when combined with a seal manufactured from the SKF fluoro rubber material SKF Duralife1). This sealing system solution lasted 2 500 hours in a contamination installation procedure is common to both SKF SPEEDI-SLEEVE designs and the original seal size can still be sleeves listed in the product tables start-ing on page 8 can be manufactured as SKF SPEEDI-SLEEVE rangeThe standard size range covers sleeves for shaft diameters from 11,99 to 203,33 mm ( to 8 in.). Depending on production quantities, non-standard sizes can be manu-factured. For additional information, contact SKF. Each sleeve is designed to fit a specific shaft range, usually above and below the nominal shaft diameter.

6 This permits some flexibility to accommodate variations in the actual shaft the sleeve sizeTo determine the appropriate sleeve size, it is first necessary to clean the shaft carefully. The diameter of an undamaged section of the seal counterface should then be measured on at least three different planes. The arithmetical mean of these measurements determines the size of SKF SPEEDI-SLEEVE . If the value lies within the permissible range listed in the product table for the shaft diameter d1, the selected SKF SPEEDI-SLEEVE will have an adequate tight fit on the shaft and will not require an 1 Removable flangeSKF SPEEDI-SLEEVE new generation , Gold version 1) Previously named LonglifeThe standard size range covers sleeves for shaft diameters from 11,99 to 203,33 mm ( to 8 in.

7 SKF SPEEDI-SLEEVE removable flange4 Test resultsThe previous and new generation of SKF SPEEDI-SLEEVE products were tested for abrasion resistance under both coarse and fine dust conditions. A 500 hour contamina-tion test ( diagram 1) showed that when compared to the previous generation sleeve , the new generation SKF SPEEDI-SLEEVE reduced abrasion by a factor of 1,5 and was still operating test sealing system effectiveness, a 2 000 hour life test was performed ( diagram 2) using SKF SPEEDI-SLEEVE new and previous generation products and SKF WAVE seals made from the SKF fluoro rubber material SKF Duralife. The test results showed that SKF SPEEDI-SLEEVE new gen-eration reduced the sealing lip wear and the variation in the wear rate by approximately 30% compared to the previous generation sleeve and outperformed a chromium-plated surface by a factor of 2.

8 This reduction improves the sealing system reliability as well as the predictability of the system service tests were carried out under the same operating conditions: temperatures up to 110 C (225 F) linear shaft speeds of up to 8,6 m/s (1 700 ft/min)In other tests, it was found that continuous salt spray at 35 C (95 F) produced no trace of corrosion even after 600 hours. This opti-mized performance is made possible through the use of the new generation of SKF 2 Sealing lip wear testSeals made from fluoro rubber, test stopped at 2 000 hoursDiagram 1 SKF SPEEDI-SLEEVE wear test Abrasive media, test stopped at 500 hoursChromium-plated surfaceNew generationSKF speedi - SLEEVEP revious generationSKF speedi -SLEEVES leeve wear[10-2 mm2]Sealing lip wear[10-2 mm2]New generationSKF speedi - SLEEVEP revious generationSKF speedi -SLEEVE10008060402020051015 Variation Average Variation Average5 Installing SKF speedi -SLEEVEFig.

9 2A new seal counterface in a few minutesAlthough installation is simple, it should be done carefully to achieve the best results. As the thin-walled sleeve has an interference fit, any disturbances on the shaft surface may create a similar pattern on the sleeve surface and cause the seal to leak. Therefore, the seal counterface surface of the shaft should be carefully cleaned and any burrs or rough spots filed down prior to installation. Deep wear grooves, scratches or very rough surfaces should be treated with a suitable powdered metal epoxy-type filler. The sleeve must be positioned on the shaft before the filler has hardened. SKF SPEEDI-SLEEVE must not be installed over keyways, cross holes, splines or threads since this will result in deformation of the sleeve , making it difficult for the seal to follow its new counterface surface as it rotates.

10 SKF SPEEDI-SLEEVE should never be heated prior to installation. Using heat will cause the sleeve to expand, but when it cools, it may not contract back to its original size, resulting in a loose fit on the shaft. See fig. 2 for different SKF SPEEDI-SLEEVE SPEEDI-SLEEVE installations6 Installation procedure1 Clean the seal counterface surface on the shaft. File down any burrs or rough spots and make sure that the sleeve will not be installed over keyways, cross holes, splines or Measure the diameter on an unworn por-tion of the shaft where the sleeve will be positioned ( fig. 3). Measure in three positions and average the readings to make sure the shaft is within recommended specifications. If the average diameter is within the range for a given sleeve size, there is sufficient press fit built into the sleeve to prevent it from sliding or spin-ning without using an Determine where the sleeve must be posi-tioned to cover the worn area.